The video in my trim mode interface does not update whether I use the buttons within the window with my mouse or using keyboard short cuts. Is there a setting i am failing to find? This problem existed both on the 2011 iMac i used and my current Mac Pro Trashcanputer, 3.5 GHz 6-core with 16 GB ram running Premiere 12.1.0.
Sorry for the situation you're in. I can't reproduce your error, though. Can you try a new sequence? If that does not work, can you try a new project? Let us know if you can get it working then.